Well, this is why there are custom lists here, I guess. So you can be more specific about your likings and not rank your favorites when they are not in the same genre at all. It's just that I thoroughly enjoyed Girl Friends (despite some shortcomings), and when I read in the comments here that people rank this one almost on par, I thought I would give it a shot. But then, I was underwhelmed I guess ? But some people said it was their "first yuri ever", so it adds weight to it for them.
Sasameki Koto pulled me in this part of the Internet. and I fell in like with it. Maybe I'm the type to overanalyze things (not maybe actually, more, like, obviously), but when I love something, I introspect a lot to know why that is, because then it may allow me to repeat the experience with something new. So I go by theme, genre, style, etc...
You like "F for Fake" and "Spione", but if you don't think about why you like them and why you think a little higher of one over the other, then maybe you're missing on some other films you would love as much or more. Just my opinion of course.